<?php
$ageList=[25,26,36,45,39];
var_dump($ageList);

$nameList=["lsk","chy","xrx"];
var_dump($nameList);
echo "<br>";
echo count($ageList);
$ageList[1]=100;
echo "<hr>";
var_dump($ageList);

echo "<hr>";

$score=[62,85,95,98,57,60];
for($i=0;$i<count($score);$i++){
    echo "$score[$i] <br>";
}
echo "<hr>";
$score1=[62,85,95,98,57,60];
for($i=0;$i<count($score1);$i++){
    if($i%2==1){
        $score1[$i]+=5;
    }
}
var_dump($score1);
echo "<hr>";
$user=['uid' => '123','upw'=> '111111'];   
var_dump($user);
echo $user['uid'];
echo "<hr>";

$user0=['uid' => '123','upw'=> '111111'];
$user1=['uid' => '1233','upw'=> '11111123'];
$user2=['uid' => '1234','upw'=> '11111133'];
$user3=['uid' => '1235','upw'=> '11111144'];
$userList[]=$user0;
$userList[]=$user1;
$userList[]=$user2;
$userList[]=$user3;
var_dump($userList);

echo "<hr>";
$user=['uid' => '123','upw'=> '111111']; 
foreach($user as $k=>$v){
    echo "$k $v  <br>";
}